Backlight problem

[thebennyboy]

I bought a refurbished monitor off fleabay for £70 which does have a 12 month warranty. The monitor sometimes doesn't start with all it's backlights working properly. Sometimes restarting the monitor gets it back to normal, sometime it doesn't. Is there a dodgy setting somewhere or is it likely faulty?

This is what i mean:

Spoiler

 

[varkanoid]

Faulty

 

[thebennyboy]

Out of interest does anybody know what the issue is likely to be with the monitor?